1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a28177fe31afdf180d6b58643f5bffe449361261c33967c9859f0eb5a061ba. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae67ada0-8d55-431b-8a31-9b2c0e526932.json and https://artists.proofprofile.net/proofs/artist/ae67ada0-8d55-431b-8a31-9b2c0e526932.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaab3f52082468be8f54244c97e082e806ab32c17cce368e4dc265d987890d3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1745556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb3c15b89b6fd433d8a9fc9e8ffdc64004c64e5754037b8405afc11963403ca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1745586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa1b3d67803a9fc9be18c1d4597358b888afd9c51b849f7cb8c7b99095f3283. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1745588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726a166d1a1f562a36cc790b01327bf0cbe22a962a209914775ccb0f25f0c59c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1745591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93af7131fa0e7200ef331ede72904813e132909c52c226bdf12347e416c83caa. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1745594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c704ae71277144caad9dcb051f277fa4373f6fd504a14fb9c153fe004135653. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1745596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a8b89113f498471066a96fe2c636261dbee16c686bcd67054b67e9611d60ef. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1745597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6a014b1b1acba2eaf9e8fad3a6eb353f92dfa4a9613d6dcf42edcb09f1d47a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1745599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83426f57f9987361c81d3bb49ff377ecb07c85d33714ea5d41f597dd7ab5111. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1745600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e82b43e3ff5e5a26db0cf2c592b02168110de6271388ba6f89d5e574f1fe9ce. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1745603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ffb87118ec00fcdb36fe07ce777241206cd2f4925015716684542c547529b7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1745604.
Grupo Madalena e as Histórias em Samba de Lúcia Tina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e59041cafd6d099b919d5b87ee7ab5144908ba6530dafe85b56bbe9fd28f2e. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF81900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cbbeb83867e019e647708a138fc225dfc048d151ad051c0c895dfb04205c0f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF81900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80d47c48f9ca95f651ede72afb56854bff6322dc63550d2fa91791f9f5f738c. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF81900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe38188430384fa8a605476be72da16ccfdba645368628f73cc07806f72fa300. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF81900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce92ebccf9e07c4a045aba2dd17eec8f40ae637ed7e38f804422f5ce833fcdf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF81900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f90dc8556a89c2c970b63b698e46f04a32ec2298b001f1911541bf09b0a319. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF81900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a2d863eab9d1a10f7673935b9e3257a839dfdf363d0a7ad353ffff8dfd0013. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF81900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1c755ec732eb343ff627ee9130ba6ba8fdd858fc3a918a18b132c9c6d155c2. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF82300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5677f8f708fa59367c838e57cc35568699df12d0891701044c9ab9a64dd7639. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF82200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50fe864cccbefc1a065a8b9ecebd28c3fc9d1ff5ac8efc79445c682f4e48bff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF82100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14d29ffdbe401d23934c704d4cd2ea77d4d22dd3c6820f70cba946ee93a4af9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF82100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286130353198a36a482c2db1627bafd1f94ca483adf1191f3f3e4b6fa678e0bc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF82100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff7cc0596233143a78a8a3c1ca370420031590b95eb3cfa26decafb10ba7e30. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF82100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9979dbb93a02cca9c2d91a3b1f800fc7e0caca7d6f14db4920c8a581b6b48c6e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF82000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ab5864d7b73ab40bcf2c9bae99775596273a563a4dfb08fcd22c09bc0e3653. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXXF82000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97415a3d7c05fc683889dca63811c2d4299f93e7d5ce8dd6fad50f8d002e7e5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2050252.